for i in range(0, nbLink):
link_id = res['network'][0]['ietf-network-topology:link'][i]['link-id']
link_type = res['network'][0]['ietf-network-topology:link'][i]['org-openroadm-common-network:link-type']
for i in range(0, nbLink):
link_id = res['network'][0]['ietf-network-topology:link'][i]['link-id']
link_type = res['network'][0]['ietf-network-topology:link'][i]['org-openroadm-common-network:link-type']